Change `layout: none` to layout: null` in sitemap.xml YAML front matter to no longer get warning when building the site.
Change `layout: none` to layout: null` in sitemap.xml YAML front matter to no longer get warning when building the site.

S1SYPHOS/davidensinger.github.io,hellfish2/davidensinger.github.io,hellfish2/davidensinger.github.io,S1SYPHOS/davidensinger.github.io,davidensinger/davidensinger.github.io,davidensinger/davidensinger.github.io,S1SYPHOS/davidensinger.github.io,davidensinger/davidensinger.github.io